1. a Centre for Ecology and Hydrology Monks Wood , Abbots Ripton, Huntingdon, Cambridgeshire PE28 2LS, UK
2. b Departamento de Geografía , Universidad de Alcalá , Colegios 2, E‐28801, Alcalá de Henares, Madrid, Spain
3. c Department of Geography , University of Leicester , University Road, Leicester LE1 7RH, UK
4. d Center for Spatial Technologies and Remote Sensing (CSTARS) , University of California , 250‐N, The Barn, One Shields Avenue, Davis, CA 95616‐8617, USA
5. e Centro de Ciencias Humanas y Sociales , Consejo Superior De Investigaciones Científicas (CSIC) , C/ Albasanz 26‐28, E‐28037, Madrid, Spain